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本文讨论了PRD—149这种新型超高模量Kevlar(芳纶)纤维的形貌及物理性能。该纤维结晶度高,具有独特的超晶态结构。其细纱的抗张强度为2.3～2.6GPa,抗张模量为162～175GPa,而市场供应的Kevlar—49纤维的抗张强度约为2.8GPa,抗张模量约为121GPa(与纤维型号和旦数有关)。PRD—149的高结晶度减小了纤维的蠕变和回潮率。纤维性能在复合材料中转化较好。其环氧浸渍原丝模量与高强碳纤维相近。预料它能在许多领域,从光导纤维电缆增强材料到芳纶/碳纤维混杂复合材料中得以应用。
This article discusses the morphology and physical properties of PRD-149, a new ultra-high modulus Kevlar fiber. The fiber is highly crystalline and has a unique supercrystalline structure. The spun yarn tensile strength of 2.3 ~ 2.6GPa, tensile modulus 162 ~ 175GPa, while the market supply of Kevlar-49 fiber tensile strength of about 2.8GPa, tensile modulus of about 121GPa (with the fiber type and denier) . The high crystallinity of PRD-149 reduces fiber creep and moisture regain. Fiber properties in the composite material conversion is better. The epoxy impregnated yarn modulus and high strength carbon fiber similar. It is expected to find application in many areas, from optical fiber cable reinforcements to aramid / carbon fiber hybrid composites.